code: def fake_reduce(self, **kwargs):
      return DocumentArray([Document(id="fake_document")])
  
imports: import numpy
  import pytest
  from jina import Client, Document, DocumentArray, Executor, Flow, requests
label_desc: Use image node_id 1 for calling the DummyExecutor obj's underlying member method code with example usage: obj.fake_reduce() and returns: DocumentArray